Construction beam

ABSTRACT

A construction beam includes an elongated main body having two vertical walls, a top wall connected between top edges of the two vertical walls, two bottom walls respectively inward extending from bottom edges of the two vertical walls, and two upright walls upward extending from free edge of the bottom walls by a certain height. Multiple spacer assemblies are disposed between the two vertical walls of the main body to keep the vertical walls spaced from each other by a fixed distance. When mounting wooden bars on the beams, the wooden bars are secured to the main bodies by means of multiple fastening members for laying a moldboard on the wooden bars. Two beams can be axially connected with each other by means of a connection member to elongate the length of the beam.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a construction implement, andmore particularly to a construction beam.

2. Description of the Related Art

In construction operation, concrete is grouted to form solid structureof a construction. When grouting in various construction sites, beamsare popularly used to support wooden bars for supporting the moldboardas a common construction means. The beams are able to bear the weight orpressure of the concrete.

Most of the conventional beams are wooden beams and metal beams. Thewooden beam has a poor structural strength and cannot be recovered. Incase of damage, the wooden beam can be only directly discarded withoutpossibility of reuse. This is not a good option in modern times thatemphasizes environmental protection.

The conventional metal beam has a quite simple cross-sectionalstructure. Therefore, the metal beam can only bear limited pressure. Incase of greater application force, the beam is often deformed orlaterally bent. Therefore, the conventional metal beam can hardly beargreater action force.

Moreover, the grouting moldboard is supported by the wooden bars, whichare supported by the beams. However, neither the wooden beams nor themetal beams are designed with structure for fixing the wooden bars. Incase of stronger grouting intensity, the wooden bars often displace fromtheir home positions due to shock or even drop down from the beams.Under such circumstance, the moldboard will break apart and the concretewill fall to cause danger. Beside, the conventional beam has a fixedlength and lacks any suitable design for connecting the beams into alonger length. In the case that the grouting area exceeds the length ofthe beam, many workers often randomly set the beams. As a result, thebeams will intersect each other to asymmetrically support the moldboard.This will cause uneven supporting force for the respective parts of themoldboard. Therefore, it has become a critical issue how to provide adesign for fixing the wooden bars and connecting the beams with eachother.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide aconstruction beam, which has higher force bearing strength and is moresolid and durable.

It is a further object of the present invention to provide aconstruction beam. When mounting wooden bars on the beams, the woodenbars can be secured to the main bodies by means of multiple fasteningmembers for laying a moldboard on the wooden bars.

It is still a further object of the present invention to provide aconstruction beam. Two beams can be axially connected with each other bymeans of a connection member to form a support beam with longer lengthin accordance with the grouting area.

The construction beam of the present invention includes:

a main body, which is an elongated body having uniform cross-sectionalshape, the main body including two vertical walls, a top walltransversely connected between top edges of the two vertical walls, twobottom walls inward horizontally extending from bottom edges of the twovertical walls, and two upright walls upward extending from free edge ofthe bottom walls by a certain height; and

multiple spacer assemblies disposed between the two vertical walls ofthe main body, two ends of each spacer assembly abutting against the twovertical walls to keep the two vertical walls spaced from each other bya fixed distance.

In the above beam, the multiple spacer assemblies are disposed betweenthe two vertical walls of the main body to restrict the two verticalwalls and keep the two vertical walls spaced from each other by a fixeddistance. Accordingly, when a force is applied to the vertical walls,the vertical walls are prevented from contracting or deforming.

Multiple perforations formed through the two vertical walls of the mainbody the above beam; a connection bolt member is passed through theperforations of the two vertical walls to connect the main body with afastening member for fixing wooden bars. Accordingly, the wooden barsare prevented from swinging to provide a support for the moldboard andfacilitate construction work.

One end of the beam is connectable with one end of a connection memberby means of at least one threaded assembly. The other end of theconnection member is connected with another beam to axially connect thebeams to form a support beam with a necessary length in accordance withthe grouting area in construction work for supporting the moldboard.Multiple support beams can be regularly arranged to uniformly supportevery part of the moldboard.

The present invention can be best understood through the followingdescription and accompanying drawings, wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a first embodiment of the presentinvention;

FIG. 2 is a perspective exploded view of the first embodiment of thepresent invention according to FIG. 1;

FIG. 3A is a sectional view taken along line 3-3 of FIG. 1;

FIG. 3B is a sectional view of the first embodiment of the presentinvention in another aspect;

FIGS. 4A and 4B are perspective views of the fastening member of thepresent invention;

FIG. 5 is a perspective view showing that the fastening members areconnected with the beam of the present invention;

FIG. 6 is a perspective view showing that the wooden bars are mounted onthe beams of the present invention;

FIG. 7 is a front view according to FIG. 6;

FIG. 8 is a perspective view showing that two beams of the presentinvention are to be connected by a connection member;

FIG. 9 is a perspective view showing that two beams of the presentinvention are connected by the connection member;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is a perspective view showing that two beams of the presentinvention are axially connected by the connection member;

FIG. 12 is a sectional view of a second embodiment of the constructionbeam of the present invention;

FIG. 13 is a comparison curve diagram between the construction beam ofthe present invention and four conventional construction beams; and

FIG. 14 is a comparison table between the beam of the present inventionand four conventional construction beams.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 1 to 3, which show a first embodiment of theconstruction beam 10 of the present invention. The construction beam 10includes a main body 20, which is an elongated metal-made body. The mainbody 20 has uniform cross-sectional shape. The main body 20 includes twovertical walls 21 side by side arranged at a certain interval inparallel to each other, a top wall 22 transversely connected between topedges of the two vertical walls 21, and two bottom walls 23 inwardhorizontally extending from bottom edges of the two vertical walls 21.Each bottom wall 23 has a free edge. An upright wall 24 upward extendsfrom the free edge of the bottom wall 23 by a certain height. Multipleperforations 25 are formed through the two vertical walls 21 andarranged in a longitudinal direction of the main body 20 at equalintervals near the top edges of the vertical walls 21. At least twoconnection holes 27 are formed through the two vertical walls 21 neartwo ends of the main body 20 respectively. Each end of the main body 20is formed with two connection holes 27 arranged in the longitudinaldirection of the main body 20. A predetermined number of reinforcementsections 211, which are recessed/raised sections formed by punching, aredisposed on the two vertical walls 21. A hole is formed at the center ofeach reinforcement section 211. Multiple through holes 28 are formedthrough the two vertical walls 21.

The vertical wall 21, the bottom wall 23 and the upright wall 24 on thesame side of the main body 20 define therebetween a receiving space 26.

Multiple spacer assemblies 30 are disposed in the main body 20 at equalintervals. In this embodiment, there are four spacer assemblies 30. Eachspacer assembly 30 is composed of a spacer member 31 and a restrictionassembly. The spacer member 31 is a tubular body having a passage 32.The spacer member 31 is disposed in the main body 20 with two ends inabutment against inner faces of the two vertical walls 21 as shown inFIG. 3A. The passage 32 is aligned with one through hole 28 of the mainbody. In this embodiment, the restriction assembly is a threadedassembly including a bolt 36 and a nut 37. The rod body of the bolt 36extends through the through holes 28 of the two vertical walls 21 andthe passage 32 of the spacer member 31 to screw with the nut 37.Accordingly, the spacer member 31 is secured between the two verticalwalls 21. Please refer to FIG. 3A. Two ends of the spacer member 31serve as two inner abutment sections 33 of the restriction assembly toabut against the inner faces of the two vertical walls 21 respectively.The head section of the bolt 36 and the nut 37 serve as two outerabutment sections 34 of the restriction assembly to abut against outerfaces of the two vertical walls 21 respectively. Accordingly, the twovertical walls are kept spaced from each other by a fixed distancewithout being biased toward each other or outward expanded, whereby therigidity and strength of the main body can be maintained.

It should be noted that each restriction assembly can be alternatively arivet 38 as shown in FIG. 3B. The rivet 38 passes through the throughholes 28 of the two vertical walls 21 and the passage 32 of the spacermember 31. Two ends of the rivet 38 serve as the outer abutment sections34 to abut against the outer faces of the two vertical walls 21, wherebythe two vertical walls 21 are kept spaced from each other by a fixeddistance.

Please now refer to FIGS. 4 and 5. The present invention furtherincludes at least one fastening member 40 having a board body 41, twoupright walls 43 and two protrusion walls 45. The board body 41 has arectangular shape with four lateral sides 42. The two upright walls 43are disposed on a pair of lateral sides 42 of the board body 41 inparallel to each other and upward extend therefrom. The two protrusionwalls 45 are disposed on the other pair of lateral sides 42 of the boardbody 41 and downward extend therefrom. The board body 41 and the twoupright walls 43 define a receiving space 47. The fastening member 40 isbridged over the beam 10 with the board body 20 in contact with the topwall 22 and the two protrusion walls 45 in contact with the two verticalwalls 21 of the main body 20 respectively. A connection bolt member 48is passed through the securing holes 46 of the two protrusion walls 45and the perforations 25 of the two vertical walls 21. One end of theconnection bolt member 48 has a stopper section 481, while the other endof the connection bolt member 48 is pivotally connected with a stoppermember 482. After the connection bolt member 48 is passed through thetwo protrusion walls 45 and the two vertical walls 21, the stoppermember 482 will naturally rotate downward to suspend from the connectionbolt member 48 as shown in FIG. 4A. Under such circumstance, theconnection bolt member 48 is hindered from detaching from the fasteningmember. Accordingly, the fastening member 40 is connected with the beam10 by means of the connection bolt member 48.

FIG. 6 shows the use of this embodiment of the present invention.Multiple beams 10 are side by side arranged in parallel to each other atintervals. Several fastening members 40 are mounted on the beams.Multiple wooden bars 70 are bridged over the beams 10 and positioned inthe receiving spaces 47 of the fastening members 40. A fixing member 49is passed through the fixing holes 44 of the upright walls 43 of thefastening member (as shown in FIG. 4) to fix the wooden bar 70. Thefixing member 49 can be a bolt, a self-tapping screw, a nail or the likethat can fix or connect articles. After the wooden bars 70 are connectedwith the fastening members 40, a moldboard 71 is placed on the woodenbars 70 as shown in FIG. 7. Referring to FIG. 7, when grouting, theconcrete is poured from the upper side of the moldboard 71 to uniformlyput the weight of the concrete on the moldboard 71. The moldboard 71spreads the weight to every wooden bar 70. The wooden bars 70 thenfurther spread the weight to the respective beams 10. The wooden bars 70are fixed by the fastening members 40 so that the wooden bars 70 willnot randomly displace due to impact of the concrete. Therefore, thewooden bars 70 keep having higher force bearing strength. The verticalwalls 21 and the upright walls 24 of the beams 10 are right directed inthe weight direction of the concrete so that the beams are able to bearthe weight. The spacer members 31 mounted between the two vertical walls21 of the beam 10 also provide an effect. Two ends of the spacer member31 serve as the inner abutment sections 33 for supporting the verticalwalls 21 and keeping the vertical walls 21 spaced from each other by afixed distance without inward contracting. The outer abutment sections34 of the restriction assembly, (that is, the head section of the bolt36 and the nut 37), abut against the outer faces of the two verticalwalls 21 to restrict the vertical walls 21 from outward expanding ordeforming. Therefore, the two vertical walls 21 are kept spaced fromeach other by a fixed distance to ensure the structural strength of thebeams 10. Moreover, the reinforcement sections 211 of the beam 10 serveto increase the strength of the beam. The two vertical walls 21 and thetwo upright walls 24 of the beam stand opposite to each other and aredirected in the pressure direction of the concrete. Therefore, thestructural strength of the beams 10 is increased and the beams 10 areable to bear greater forward pressure.

In case of larger grouting area and insufficient length of the beams 10,the present invention provides a connection member 50 as shown in FIG. 8to axially connect two beams 10. Accordingly, the beams can be assembledto elongate the beam to a length sufficient for supporting themoldboard. Moreover, the force bearing strength of the two beams 10 canbe increased.

Please refer to FIG. 8. The components of the construction beam 10 areidentical to those of the first embodiment and thus will not berepeatedly described hereinafter. The same components are denoted withthe same reference numerals.

The connection member 50 is a metal member including a main body 51,which is a hollow elongated body with uniform cross-sectional shape suchas rectangular shape. Four apertures 53 are transversely formed throughtwo lateral walls 52 of the main body 51 near two ends of the main body51 respectively. The apertures 53 are arranged in a longitudinaldirection of the main body 51.

Two connection components 55 are fixedly connected with the main body51. Each connection component 55 has a substantially U-shaped crosssection. The connection component 55 includes two vertical leg sections56 side by side arranged at a certain interval in parallel to each otherand a top board 57 transversely connected between top edges of the twoleg sections 56. The top board 57 of the connection component 55 isfixedly connected with the bottom wall 54 of the main body 51. The twoleg sections 56 are formed under the bottom of the main body 51.

Four threaded assemblies 60 are also provided. Each threaded assembly 60includes a bolt 62 and a nut 64.

Please refer to FIGS. 9 to 11. When axially connecting the two beams 10,one end of each beam 10 is fitted onto one end of the connection member50. The two leg sections 56 of the connection component 55 arerespectively received in the two receiving spaces 26. The connectionholes 27 of one end of each beam 10 are aligned with the apertures 53 ofone end of the connection member 50. Then, the bolts 62 of the fourthreaded assemblies 60 are respectively passed through the connectionholes 27 of the beam 10 and the apertures 53 of the connection member 50to screw with the nuts 64. Accordingly, the two beams 10 are securelyconnected with the connection member 50.

The connection member 50 can be used to axially securely connect atleast two beams 10. Preferably, the two leg sections 56 abut against thebottom walls 23 of the main body 20 as shown in FIG. 10. Also, the topend of the connection member 50 abuts against the top wall 22 of themain body 20, whereby the connection member 50 also serves to increasethe force bearing strength of the main body 20 and enhance thesupporting effect of the beam 10 for the moldboard.

After two or more beams 10 are axially connected, more wooden bars 70can be fixed on the beams 10 by means of multiple fastening members 40for supporting a longer moldboard.

FIG. 12 shows a second embodiment of the construction beam 10 of thepresent invention. The same components are denoted with the samereference numerals. In this embodiment, the spacer assembly 30 is anelongated (tubular or cylindrical) spacer member 39 passing through thethrough holes 28 of the two vertical walls 21 of the main body 20. Thecircumference of each of two ends of the spacer member 39 is formed withan inner abutment flange 33 and an outer abutment flange 34. The innerand outer abutment flanges 33, 34 respectively abut against the innerand outer faces of the two vertical walls 21 to keep the two verticalwalls 21 spaced from each other by a fixed distance and ensure that thebeam has sufficient strength.

The construction beam of the present invention is advantageous overother construction beams on the current market. The beam of the presentinvention is compared with the other four conventional beams A, B, C, Din bending moment and performance per unit price as follows:

FIG. 13 is a comparison diagram between the present invention and thefour conventional beams. The thicker the floorboard to be grouted is,the shorter the distance between the arranged beams is. A larger bendingmoment of the beam means a greater force bearing strength of the beam.In this case, the beam is more unlikely to break. Therefore, a beam withlarger bending moment is able to bear greater load and the distancebetween the arranged beams is also longer. The bending moment M iscalculated by yield strength (Fy) multiplying section modulus (Z).

Please also refer to FIG. 14. The preferred embodiment of theconstruction beam (abbreviated as top beam) of the present invention ismade of Q390 steel material with a yield strength (Fy) of 4000 kgf/cm²and a section modulus (Z) of 26.2 cm³. Accordingly, the bending moment(M) of the beam of the present invention can be calculated to be4000×26.2=104800 kgf-cm. The weight of the beam of the present inventionis 6 kg/m. The price per kilogram is NT$ (as hereinafter) 45 dollars/kg.Therefore, the performance of the beam of the present invention per unitprice is 104800/(6 kg/m*45 dollars/kg)=388.15 kgf-cm/dollar.

Beam A (EFCO E-beam) has a trapezoidal cross section. The yield strength(Fy) of beam A is 3600 kgf/cm² and the section modulus (Z) of beam A is28.6 cm³. Accordingly, the bending moment (M) of beam A can becalculated to be 3600×28.6=102960 kgf-cm. The weight of beam A is 5.5kg/m. The price per kilogram is 106.7 dollars/kg. Therefore, theperformance of beam A per unit price is 102960/(5.5 kg/m*106.7dollars/kg)=175.40 kgf-cm/dollar.

Beam B (lightweight channeled steel, two pieces) is an I-beam. The yieldstrength (Fy) of beam B is 2500 kgf/cm² and the section modulus (Z) ofbeam B is 33.6 cm³. Accordingly, the bending moment (M) of beam B can becalculated to be 2500×33.6=84000 kgf-cm. The weight of beam B is 8.2kg/m. The price per kilogram is 28 dollars/kg. Therefore, theperformance of beam B per unit price is 84000/(8.2 kg/m*28dollars/kg)=365.85 kgf-cm/dollar.

Beam C (H20 wooden beam) is a wooden beam. Through test, the bendingmoment of beam C is found to be 50968 kgf-cm. The weight of beam C is4.7 kg/m. The price per kilogram is 83 dollars/kg. Therefore, theperformance of beam C per unit price is 50968/(4.7 kg/m*83dollars/kg)=130.65 kgf-cm/dollar.

Beam D (lightweight channeled steel, one piece) is a C-beam. The yieldstrength (Fy) of beam D is 2500 kgf/cm² and the section modulus (Z) ofbeam D is 16.8 cm³. Accordingly, the bending moment (M) of beam D can becalculated to be 2500×16.8=42000 kgf-cm. The weight of beam D is 4.1kg/m. The price per kilogram is 28 dollars/kg. Therefore, theperformance of beam D per unit price is 42000/(4.1 kg/m*28dollars/kg)=365.85 kgf-cm/dollar.

Accordingly, it can be found through the comparison between the bendingmoment (M) of various beams that the beam (top beam) of the presentinvention>beam A (EFCO E-beam)>beam B (lightweight channeled steel, twopieces)>beam C (H20 wooden beam)>beam D (lightweight channeled steel,one piece). The bending moment of the beam of the present invention isthe best one. In other words, the beam of the present invention has agreatest force bearing strength for bearing highest action force. Pleasefurther refer to the comparison diagram between the performances of thebeams per unit price. In sequence, the beam (top beam) of the presentinvention>beam B (lightweight channeled steel, two pieces)=beam D(lightweight channeled steel, one piece)>beam A (EFCO E-beam)>beam C(H20 wooden beam). The beam of the present invention still has a highestperformance. This means the beam of the present invention can providebetter supporting force at the same cost. Moreover, the price perkilogram of the beam of the present invention is even less than one halfof the price of beam A with the second best bending moment. This meansthe same money can only buy one beam A, while two beams of the presentinvention. The assembly of two side by side arranged beams of thepresent invention can achieve a bending moment much higher than thebending moment of beam A. However, the price is still less than theprice of one beam A. Therefore, the beam of the present invention notonly has a solid structure, but also is quite advantageous over theconventional beams in cost-performance ratio.

Furthermore, according to statistics, the average bearable carriageweight of a human at one time is not over 25 kg. In the presentinvention, even if three beams are assembled into a longer beam, theweight of the assembly including the weight of the connection members isnot over 23 kg. This value is lower than the average bearable carriageweight of a human. Therefore, even a thinner and shorter person cancarry the beams. Therefore, the beam of the present invention has theadvantages of better structural strength, higher cost-performance ratioand lightweight. Also, the beam of the present invention is easy tocarry without causing heavy burden to construction workers.

The above embodiments are only used to illustrate the present invention,not intended to limit the scope thereof. Many modifications of the aboveembodiments can be made without departing from the spirit of the presentinvention.

What is claimed is:
 1. A construction beam, which is an elongated body,comprising: a main body, which is an elongated body having uniformcross-sectional shape, the main body including two vertical walls sideby side arranged at a certain interval in parallel to each other; a topwall transversely connected between top edges of the two vertical walls;two bottom walls inward horizontally extending from bottom edges of thetwo vertical walls, and two upright walls upward extending from freeedge of the bottom walls by a certain height; multiple through holesformed through the two vertical walls of the main body; and multiplespacer assemblies passing through the through holes of the two verticalwalls of the main body, each of two ends of each spacer assembly beingformed with an inner abutment section and an outer abutment section, thetwo inner abutment sections of the spacer assembly respectively abuttingagainst inner faces of the two vertical walls, while the two outerabutment sections of the spacer assembly respectively abutting againstouter faces of the two vertical walls.
 2. The beam as claimed in claim1, wherein each spacer assembly is an elongated spacer member, the twoinner and two outer abutment sections being respectively formed at twoends of the spacer member.
 3. The beam as claimed in claim 1, whereineach spacer assembly includes a spacer member and a restrictionassembly, the spacer member being a tubular body having a passage; therestriction assembly having two ends and being passed through thethrough holes of the two vertical walls and the passage of the spacermember, two ends of the spacer member serving as the two inner abutmentsections; two ends of the restriction assembly serving as the two outerabutment sections.
 4. The beam as claimed in claim 3, wherein therestriction assembly is composed of a bolt and a nut, the bolt having ahead section, the head section of the bolt and the nut serving as thetwo outer abutment sections.
 5. The beam as claimed in claim 3, whereinthe restriction assembly is a rivet, two ends of the rivet serving asthe two outer abutment sections.
 6. The beam as claimed in claim 1,wherein multiple perforations are formed through the two vertical wallsof the main body, the perforations are arranged in a longitudinaldirection of the main body at equal intervals and near the top edges ofthe vertical walls.
 7. The beam as claimed in claim 1, wherein: multipleperforations are formed through the two vertical walls of the main bodyand arranged in a longitudinal direction of the main body; and furthercomprising: a fastening member having a board body, two upright wallsand two protrusion walls, the board body having at least four lateralsides, the two upright walls being disposed on a pair of lateral sidesof the board body and upward extending from the board body, the boardbody and the two upright walls defining a receiving space; the twoprotrusion walls being disposed on the other pair of lateral sides ofthe board body and downward extending from the board body, eachprotrusion wall having at least one securing holes; the fastening memberbeing disposed on the top wall of the main body; at least one connectionbolt member being passed through the securing holes of the twoprotrusion walls of the fastening member and the perforations of the twovertical walls of the main body to connect the fastening member with themain body.
 8. The beam as claimed in claim 1, wherein the vertical wall,the bottom wall and the upright wall on the same side of the main bodydefine therebetween a receiving space; the beam further comprising aconnection member including a main body, which is a hollow elongatedbody and two vertical leg sections disposed under a bottom face of themain body; one end of the connection member extending into the main bodyof the beam with the two leg sections positioned in the two receivingspaces.
 9. The beam as claimed in claim 2, wherein the vertical wall,the bottom wall and the upright wall on the same side of the main bodydefine therebetween a receiving space; the beam further comprising aconnection member including a main body, which is a hollow elongatedbody and two vertical leg sections disposed under a bottom face of themain body; one end of the connection member extending into the main bodyof the beam with the two leg sections positioned in the two receivingspaces.
 10. The beam as claimed in claim 3, wherein the vertical wall,the bottom wall and the upright wall on the same side of the main bodydefine therebetween a receiving space; the beam further comprising aconnection member including a main body, which is a hollow elongatedbody and two vertical leg sections disposed under a bottom face of themain body; one end of the connection member extending into the main bodyof the beam with the two leg sections positioned in the two receivingspaces.
 11. The beam as claimed in claim 7, wherein the vertical wall,the bottom wall and the upright wall on the same side of the main bodydefine therebetween a receiving space; the beam further comprising aconnection member including a main body, which is a hollow elongatedbody and two vertical leg sections disposed under a bottom face of themain body; one end of the connection member extending into the main bodyof the beam with the two leg sections positioned in the two receivingspaces.
 12. The beam as claimed in claim 1, wherein: at least twoconnection holes are formed through the two vertical walls of the mainbody and near two ends of the main body respectively; and the verticalwall, the bottom wall and the upright wall on the same side of the mainbody define therebetween a receiving space; the beam further comprisinga connection member including a main body, which is a hollow elongatedbody and at least one connection component having two vertical legsections and a top board connected between the two leg sections; theconnection component being fixedly disposed under a bottom face of themain body; at least two apertures being transversely formed through twolateral walls of the connection member and near two ends of theconnection member respectively; one end of the connection memberextending into the main body of the beam; at least one threaded assemblybeing passed through the apertures of one end of the connection memberand the connection holes of one end of the main body of the beam toconnect the connection member with the main body.
 13. The beam asclaimed in claim 2, wherein: at least two connection holes are formedthrough the two vertical walls of the main body and near two ends of themain body respectively; and the vertical wall, the bottom wall and theupright wall on the same side of the main body define therebetween areceiving space; the beam further comprising a connection memberincluding a main body, which is a hollow elongated body and at least oneconnection component having two vertical leg sections and a top boardconnected between the two leg sections; the connection component beingfixedly disposed under a bottom face of the main body; at least twoapertures being transversely formed through two lateral walls of theconnection member and near two ends of the connection memberrespectively; one end of the connection member extending into the mainbody of the beam; at least one threaded assembly being passed throughthe apertures of one end of the connection member and the connectionholes of one end of the main body of the beam to connect the connectionmember with the main body.
 14. The beam as claimed in claim 3, wherein:at least two connection holes are formed through the two vertical wallsof the main body and near two ends of the main body respectively; andthe vertical wall, the bottom wall and the upright wall on the same sideof the main body define therebetween a receiving space; the beam furthercomprising a connection member including a main body, which is a hollowelongated body and at least one connection component having two verticalleg sections and a top board connected between the two leg sections; theconnection component being fixedly disposed under a bottom face of themain body; at least two apertures being transversely formed through twolateral walls of the connection member and near two ends of theconnection member respectively; one end of the connection memberextending into the main body of the beam; at least one threaded assemblybeing passed through the apertures of one end of the connection memberand the connection holes of one end of the main body of the beam toconnect the connection member with the main body.
 15. The beam asclaimed in claim 7, wherein: at least two connection holes are formedthrough the two vertical walls of the main body and near two ends of themain body respectively; and the vertical wall, the bottom wall and theupright wall on the same side of the main body define therebetween areceiving space; the beam further comprising a connection memberincluding a main body, which is a hollow elongated body and at least oneconnection component having two vertical leg sections and a top boardconnected between the two leg sections; the connection component beingfixedly disposed under a bottom face of the main body; at least twoapertures being transversely formed through two lateral walls of theconnection member and near two ends of the connection memberrespectively; one end of the connection member extending into the mainbody of the beam; at least one threaded assembly being passed throughthe apertures of one end of the connection member and the connectionholes of one end of the main body of the beam to connect the connectionmember with the main body.
 16. The beam as claimed in claim 12, whereinthe apertures of the connection member are formed through the main bodyof the connection member.